Door latch



Jan. 29, 1929. o. P. CRAMER DOOR LATCH Filed May '7, 1927 2 Sheets-Sheet2 l/v VEN roe O 77'0 EE HIS A TTOR/YEK Patented Jan. 29, 1929.

1,700,487 yPATENT OFFICE.

OTTO IP. GRANIER, OF SAN IERAN'CISCO,y CALIFORNIA.

- noonv Laren.

Application led May 7, 1927. Serial' No. 189,468.

My invention relates to fastening means for doors, and has for an object the provision of a door latch of such construct-ion that skilledmortising of the door is not required to mount the latch in position.

Another object is the provision of a door 'latch having a boltadjustable sov that the amount of projection of the bolt from the latchis variable.

Another object is the provision of an inexpensive door latch of sturdyconstruction I set forth in the following description of the parallel tothe sides of the door 8. A bolt and dependable operation, and composedof few and simple parts.v

The invention possesses many other objects and valuable features, someofvwhich will be invention which is illustrated in the drawings formingpart of the yspecification'. It is to be` understood that I do not limitmyself to .the showing madeby the said description and drawings, as Imay adopt varying forms of my invention within the scope of the claims.

Referring to the drawings:

Figure 1 is a horizontal sectional view through the latch and a portionof the door and jamb with which it is used.

Figure 2 is a vertical sectional View of a ortion of the bolt, thedirection of. view be- 1ng indicated by the arrows 2 2 of Figure 1.

Figure 3 is a vertical sectional view of the bolt, the direction of viewbeing indicated by the arrow 3 of Figure 2.

Figure 4 is an elevation of the dogging portion of the latch', partly invertical section, the plane of section being indicated by the line 4-4of Figure 1. v

Figure 5 is a vertical sectional view of a different embodiment of thelatch.

Figure 6 is a horizontal sectional view of the latch of Figure 5, theplane ofjsection bev-A ing indicated by the line 6-6 of Figure 5.

Figurej7 is an elevation, partly in vertical section, of the dogglng andreleasing means,

the plane of section being indicate by the permit latching the door, apin is provided by which the bolt in "its extended position and thecaslng may be dogged together. The pin 1s operated by pressing one oftwo buttons to dog or release the bolt, as the case mightbe; and theentire means for operating the pin is mounted .on the exterior of thedoor within a housmg concentric with the shaft. As a result, themounting of the latch in the door requires no skillful laying out orchiseling and the only operations necessary are the boring of a fewholes on readily determined centers. An lembodiment of the invention isshown 1n Figures 1 to 4 inclusive and comprises a preferably tubularcasing 6 mounted within a hole 7 preferably bored horizontally and isslidablymounted within the casing and comprises acylindrical portion 11having one side 12 flattened and its outer end provided with an inclinedface 18, so that when the door is closed, a latching engagement of theboltwith the strike plate 14 on the jamb 16 may be effected. The portion11 of the bolt is rotatable within the casing, and is threaded to a rod17, so that the eective length of the bolt, or the distance that thebolt projects beyond the edge of the door may be varied. When the properadjustment has been made, further turning of the portion llupon the rod17 is prevented by securing a guard plate 18 in position upon the edgeof the door, so that the portion 11 extends through an aperture ofcorresponding shape in the guard plate. The rod 17 is slidablelongitudinally in the end 19 of the body 21 of the bolt; and a spring22, compressed between the .portion 11 and the body 21 of the bolt,urges the latch plate engaging portion outwardly from the body ortion.It is thus seen that the portion 11 o the bolt can bepressed back intothe casing 6 e `26, compressed between the inner end 27 of the body 21and the inner end 28 of the casing 6, urges the entire bolt outwards;and a guide 31 on the end 27 of the bolt is slidable through an aperture.in the end 28 of the casing to permit reciprocation of the bolt. The

roXimal to the inner side 25 fil end 32 of the guide is upset to limitthe outward motion of the bolt.

' Shoulders 36 are provided on the Inside of the end 27 of the bolt,leaving a recess 37 between them. Extending through the recess and theholes 38 and 39 through the body of the bolt and the door respectivelyis .a shaft 41 having a cam 42 secured thereto 41n register withtheshoulders, so that when the shaft is rotated through about 45 ineither direction, the bolt is retracted. The shaft and the hole in thedoor, in which it lies, are both perpendicular tothe axis of the hole 1nwhich the casing is positioned. To turn the shaft, door'knobs 43 areadjustably secured v to each end of the shaft; and the assembly ofknobs, shaft, and cam are mounted for rotary movement on the housings 44and 46, 'suit-l ably secured to the inner and outer sides of the door,as by screws 47.

Means are provided' for dogging the bolt in its extended position toprevent opening the door. A pin 51 isadapted to be inserted through anaperture in one side of the casing 6 into an aperture in the body of thebolt alined therewith when the bolt is in its'extended position, thuspreventing the retraction of the bolt by turning the shaft 41'. The endof the pin is tapered, and is in a-lin'ement with the inclined edge 24of the plate 23. `If v the pin 51 has been set to dog the bolt, and thenthe door is closed, the portion 11 is pressed into the casing byengagement with the strike plate, and the pin 51 is forced out ofengagement with the boltl by the edge 24. Thus shuttingl the door Willrelease the pin, should it have been previously set.

To accommodate the pin, an additional hole 52 through the door isprovided adjacent the hole 39 and parallel thereto.

Means entirely exterior of the door for o )eratinff the bolt dog infrmeans are ro' l s g e P vided on the inner side of the door within thehousing 44. A stationary plate 56 having lugs 57 struck therefrom to fitthe bore of the hole 39 so as'to properly position the plate, issuitably secured to the -inner side 25 of the door, and extends over thehole 52, where a tubular guide 58 is provided 'for the (logging pin. Asecond plate 59 is mounted for rocking movement upon the ears 61 struckfrom opposite edges of the stationary plate. The pin 51 is secured toone end of the rocking `plate by means of a pivotal joint capable ofpermitting movement, so that the pin can be moved longitudinally byrocking the plate Without moving the pin laterally. The pin is of suchlength that its end 62 projects through the housing, so that the pin maybe engaged with the bolt simply by pushing the end 62 into the housingto the end of its stroke. This causes the plate 59 to be rocked, forcingthe button 63, pivoted in a similar fashion to the other end of theplate, outwards through the a limited degree of lateral be automaticallyreleased by the plate 23 impinging u on the tapered end of the doggingpm and orcing it out of engagement with the bolt. No mortising isnecessary for the installation of the latch other than drilling holes 39and 52 through the door and perpendicularly to the sides thereof, andhole 7 into the edge of the door parallel tothe sides.

In some communities it is required that latches used on-bath room doorsbe so constructed that they may be released from the outside. To complywith this requirement, I include housing .and the plate 23. An arm 69 onthe lever extends through an aperture 71 in the in latches intended tobe usedy on such doors a stationary plate 66, suitably secured to theouter side of the door under the' Sli housing 46, so that when the armis depressed, f

the lever forces the plate 23 inwards, carrying with it the rod 17 andportion 11 of the bolt, and forcing the pin 51 out of engagement withthe bolt. I

In Figures 5, 6, and 7 is shown an embodiment of the latch ofmyinvention adaptable for use on an outside door.d In this form of thelatch, the in the embodiment first explained, is pivoted to a plate 76mounted for rockin upon a stationary plate 77 suita to the inner side 25of the door 8, upturned-ears 78 for retaining the housing 44 inposition. The pin 74 does not extend through the housing, but the plate76 is provided with arms 79 and 81 at its ends corresponding to thebuttons 62 and 63 respectively. These arms 82 and 83 respectively in thesides of the housing 44. latching means more accessible than when thebuttons are employed.

Instead of the lever 68 of Figure 1, the means for unlatching the doorfrom the o utly secured and having movement vabout its axis, secured tothe plate. 7 7 and extending loosely` through the arcuateslots 88 in theplatel 86.

An arcuate projection or flange 89 having a This arrangement `makes thepin 74 corresponding to pin 51 movement project through aperturesV-shaped notch 91 is so positioned upon the edge of the plate 86 thatthe arm 79 is disposed within the notch. Thus it is seen that Vwhen thepin 74 is in enga ement with the bolt 21, disengagement may e effectedby rotatingy the plate 86 in either direction, thus rocking the plate 76by the contact of an edge of the notci against the arm 79. y l

Means operable by key from the outer side l of the door are provided forrotating the plate 86. Suchmeans com rise a pair of extensions 92 on theplate, between which is positioned a lever 93 secured to the barrel 94of a standard key operated lock 96 having its key-hole in the outer side97 of the door. A cover 98 is retained over the lever 93 and rear endot' the lock byscrews 99 threaded into the body ot' thelock:

The4k housingl 46 on the outer side of the door is retained in positionsimilarly to the housing 44 by a. plate 101 with ears 102 over which thehousing is pressed.

To latchthe door, the arm 79 is depressed, forcing the pin 74 intoengagement With the bolt 21 as previously described. Of course this mustbe done from the inner side of the door, and forthat reason, the plate23 for automatically' releasing the pin 74, When the door is closed, isomitted, and the relatively small Washer 103 secured to the end of therod 17 in its place to limit the outward movement of the portion 11 ofthe latch bolt.4

I have found that a leushing 104 upon the shaft 41 to center the shaftin the hole 39 inthe door is an aid in assembling and helps the shaft toturn more smoothly by maintaining the shaft in alinement With the hole;

I claim:

1. A door latch comprising a casing adapted to be mounted Within thedoor, a spring pressed -latch bolt slidably mounted Within said casing,means for retracting said bolt,I a plate adapted to be mounted forrockin movement on one side of the door and a pin lcJarried by saidplate for dogging the latch olt.

2. A door latch comprising a casing adapted to be mounted Within thedoor, a spring pressed latch bolt slidably mounted Within said casing,means for retracting said bolt, a plate adapted to be mounted forrocking movement on one side of the door, a pin carried by said platefor dogging the latch bolt, a housing surrounding the' plate, and meansextending from the housing for operating the plate.

8. A door latch comprising a casing adaptcd to bc mounted within thedoor, a spring pressed latch bolt slidably mounted Within said. casing,means fo1"retrac.ting said bolt, a plate adapted to be mounted forrocking movement on one side of the door. a pin carried by said platefor dogging the latch bolt, a housing surrounding the plate, and armseX- tending from the housing for operating the plate.

4. A door latch comprising a casing adapted to be mounted within thedoor, a spring pressed latch boltslidably mounted within said casing,means forretracting said bolt,

means adapted to be arranged on one side of the door for clogging thebolt, means adapted to be arranged on the same side of the door forreleasing the bolt, and means adapted to be arranged on the oppositesideof the door@ for releasing the bolt.

5. A door latch comprising a casing adapted to be mounted within thedoor, a spring pressed latch bolt slidably mounted Within said casing,means for retracting said bolt, a pin movable transversely of the latchbolt to dog` it, and meansadapted t0 be mounted 'on each s ide of thedoor operable to move the pin to release the bolt.

6. A door latch comprising a cylindrical casing, a spring pressed boltslidably disposed in said caslng, knob actuated means for operating saidbolt, clogging means for fixing the position of the bolt, means adaptedto be mounted on vone side ofthe door for setting and releasing saiddogging means, and means adapted to be mounted on the oppqgitc side ofthe door for releasing said dogging means.

7. A door latch comprising a cylindrical casing, a spring pressed boltslidably disposed in said casing, knob actuated means for operating saidbolt, dogging means for fixing the position of the bolt, means adaptedto be mounted on one side of the door for setting and releasing said dogingmeans, and pivotally mounted means or releasing said flogging meansandoperable from the opposite side of the door.

8. A door latch comprising al cylindrical casing a bolt slidablydisposed in said casinv, a mob actuated shaft for operating said boltand extending transversely thru said casing, a clogging pin for iixingthe position of the bolt and disposed adjacent the shaft and parallelthereto, means adapted to be mounted on one exterior face of the doorfor setting and releasing said dogging means,

'and means adapted to ybe mounted on the opposite side of` the door forreleasing saidY clogging means.

9. A door latch comprising a cylindrical casing, a bolt slidablydisposed in said casing, a knob actuated shaft for operating said boltand extending transversely thru said casing, a dogging pin for fixingthe position of the bolt and disposed adjacent the shaft and parallelthereto, a housing surrounding the shaft and adapted to be mounted onone exterior face of thedoor, means Within the housing and havingportions extending therefrom, for setting and releasing sa1d doggingmeans, and means adapted to be mounted on'the opposite side ofthe doorfor releasing said dogging means.

10. A door latch comprising a casing, al

spring pressed bolt slidably dis osed in said easing, a knob actuatedshaft or operating said bolt, a dogging pin forfixing the position ofthe bolt, a plate mounted for pivl adapted for mountino- Withina door, aspring 10 'clogging means.

otal movement and operatively connected lto said dogging pin,- means forrocking said V plate to set or release the dogging pin and adapted formounting on one side of the door, and means ada ted to be mounted on theopposite side o the door for releasingsaid 11. A door latch comprisingya casing'v pressed latch bolt slidably mounted Within the casing andcomprising a body portion and a vstrike plate engaging portion slidablerelative to the body portion, knob actuated means orretracting theb-olt, a pin movable transversely of the bolt to dog it, means adaptedto be mounted exterior to the door for movin the pin, and means actuatedbythe -strike p ate engaging portion of the bolt for releasing the pin.

12. A door latch comprising a casing adapted to be mounted Within adoor, a spring pressed latch bol't comprising a body portion slidablewithin the casing and a. strike late engaging portion slidable relativeto the ody portion, means for retracting the bolt, means for cloggingthe boit,'and means actuatedfby the strike plateengaging portion forreleas- I ing said flogging' means.

13. A door latch .comprlsing a casing adapted to be mounted within thedoor, a

sprmg pressed latch bolt slidably mounted y Within said casing,vmeansfor retracting said bolt., a plate adapted to be mounted for movement onone side of the door, a pin carried by said plate for dogging they latchbolt, a housin surrounding the plate, and means extendmg from thehousing for operating the plate.

In testimony whereof, I have hereunto set my hand.

oTTo P. CRAMER.

